Screw-eastemtito- for boots and shoes



No. 10,021. PATENTBD SEPT. 13, 1050. 1. 0111100131 0 R. SNBLL. SGREWFASTBNING POR 0001s 0R s110110.

NTTEB STATES PATENT OFFICE.

`TOHN CHILOOTT AND ROBERT SNELL. VOF BROOKLYN, NEW YORK.

SCREW-FASTENING FOR BOOTS AND SHOES.

Specification of Letters Patent No. 10,021, dated September 13, 1858.

To al cli/0m it may concern Be it known that we, JOHN CniLcorT andROBERT SNELL, of the city of Brooklyn, county of Kings, and State of NewYork, have invented a new and useful Improvement in Screw-Fastenings forBoots and Shoes; and we do hereby declare that the following is a full,clear, and exact description of the same, reference being had to theaccompanying drawings, making part of this specica-tion, in which*Figure l, is a view of the underside of the sole of a boot, secured byour improved fastenings. Fig. 2, is a longitudinal section of the same.Fig. 3, is a section of part of the sole and upper, intended to show themanner in which the fastening is inserted to prevent any lumps orinequalities on the inside of the sole. Fig. 4, shows the two parts ofone of the fastenings, detached.

Similar letters of reference indicate corresponding parts, in each ofthe several figures.

In the manufacture of boots and shoes, some secure fastening is muchneeded, for the purpose of more securely uniting the different soles orparts of the sole, and attaching the uppers thereto, in heavy work; andfor the purpose of giving greater strength in certain 'parts of thesolel in lighter work. The screw has been applied in various ways forthese puposes, but never with entire success, always having failed togive the necessary security, or having made the boot or shoe so clumsy,by reason of the irregularities made on the inside of the sole, that itcould not be worn with comfort, it has therefore been discarded.

The object of our invention is to make a screw fastening that will holdthe parts together with perfect security, and at the same time allow theinner and outer surfaces of the sole to be made as smooth and even aswhen other means of security or attachments are used.

This screw fastening consists of a double metal screw or two male screwsof different sizes, of which the larger is hollow and co-ntains a femalescrew to receive the smaller. These screws are inserted through the solefrom opposite sides; the smaller being inserted from the inside and thelarger being screwed in from the outside; the latter screwing into thesole, and screwing on to the male screw, and drawing the parts togetherlike a screw and nut. The larger screw, which forms the nut for thesmaller one, being screwed into the leather, will hold the smallerscrew, and thus hold the parts together until it is almost entirely wornaway; but as it extends almost through the sole, it is not likely to beworn to such a degree. The smaller screw is let in from the inside ofthe sole, in such a way, by splitting the inner sole, that its head isentirely buried nd raises no lump or inequality inside the oot.

a, in the accompanying drawing, is the inner screw; and b, is the outerscrew, which forms also a nut to, a; each screw has a circular head, andthe outer screw has holes in the head, or is otherwise provided withsome means of inserting a screw-driver to turn it. The inner screw, a,is introduced by making a slit, d, in the inner sole, A, (which must beof stout leather,) from the edge toward the center, and by making a holein the part below the slit, through which hole the screw is insertedwith the head within the slit. The Lipper, B, must be made to overlapthe inner sole sufficiently to receive the screw, 01 for which asuitable hole is made. The inner sole and upper are then placed on thelast. The single piece or several pieces which form the outer sole, C,are bored to receive the outer screw, which must screw in tightly, andare then laid upon the inner sole and overlapping parts, c, of theupper, through which the inner screw protrudes. The outer screw, b, isthen screwed in from the outside of the sole, and by screwing onto t-heinner screw, draws all the parts together, and draws the head of thescrew, (l, so that it sinks into the sole, A. The outside face of theouter sole may be slightly countersunk to receive the head of the screw,Z), so that it may stand flush with the face of the sole. Thesefastenings may, for very strong work, be placed nearly close together;but we only propose, even in heavy work, to use a few of them, as thewaterproof adhesive cement which we employ gives the required strengthand security to the heaviest work. The slit, d, which is made in theinner sole, is intended to be closed up with waterproof adhesive cement;and the lapping parts of the upper are intended to be closely united tothe inner and outer soles by the same material.

In boring the holes in the outer sole, care Inust be taken to bring themopposite those of the inner sole, Which may be done by marking both fromone pattern.

In light boots and shoes, this fastening may be used with greatadvantage in the shank, Where there is great strain, and also in theheel.

The fastening may be used in certain parts of sewed boots; but ourintention is to make it, With the aid of Waterproof cement, supersedesewing, and make Cheaper and .stronger boots, and pleasanter to Wear.

What We claim as our invention, and desire to secure by Letters Patent,is,

JOHN CHILCOTT. ROBERT SNELL.

' Vitnesses:

L. F. COHENE, WM. DIXEY.

